

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined'
      ? module.exports = factory(global)
      : typeof define === 'function' && define.amd
        ? define(factory) : factory(global)
  }((
    typeof self !== 'undefined' ? self
      : typeof window !== 'undefined' ? window
        : typeof global !== 'undefined' ? global
          : this
  ), function (global) {
    'use strict';
    // existing version for noConflict()
    var _Base64 = global.Base64;
    var version = "2.4.6";
    // if node.js, we use Buffer
    var buffer;
    if (typeof module !== 'undefined' && module.exports) {
      try {
        buffer = require('buffer').Buffer;
      } catch (err) { }
    }
    // constants
    var b64chars
      = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    var b64tab = function (bin) {
      var t = {};
      for (var i = 0, l = bin.length; i < l; i++) t[bin.charAt(i)] = i;
      return t;
    }(b64chars);
    var fromCharCode = String.fromCharCode;
    // encoder stuff
    var cb_utob = function (c) {
      if (c.length < 2) {
        var cc = c.charCodeAt(0);
        return cc < 0x80 ? c
          : cc < 0x800 ? (fromCharCode(0xc0 | (cc >>> 6))
            + fromCharCode(0x80 | (cc & 0x3f)))
            : (fromCharCode(0xe0 | ((cc >>> 12) & 0x0f))
              + fromCharCode(0x80 | ((cc >>> 6) & 0x3f))
              + fromCharCode(0x80 | (cc & 0x3f)));
      } else {
        var cc = 0x10000
          + (c.charCodeAt(0) - 0xD800) * 0x400
          + (c.charCodeAt(1) - 0xDC00);
        return (fromCharCode(0xf0 | ((cc >>> 18) & 0x07))
          + fromCharCode(0x80 | ((cc >>> 12) & 0x3f))
          + fromCharCode(0x80 | ((cc >>> 6) & 0x3f))
          + fromCharCode(0x80 | (cc & 0x3f)));
      }
    };
    var re_utob = /[\uD800-\uDBFF][\uDC00-\uDFFFF]|[^\x00-\x7F]/g;
    var utob = function (u) {
      return u.replace(re_utob, cb_utob);
    };
    var cb_encode = function (ccc) {
      var padlen = [0, 2, 1][ccc.length % 3],
        ord = ccc.charCodeAt(0) << 16
          | ((ccc.length > 1 ? ccc.charCodeAt(1) : 0) << 8)
          | ((ccc.length > 2 ? ccc.charCodeAt(2) : 0)),
        chars = [
          b64chars.charAt(ord >>> 18),
          b64chars.charAt((ord >>> 12) & 63),
          padlen >= 2 ? '=' : b64chars.charAt((ord >>> 6) & 63),
          padlen >= 1 ? '=' : b64chars.charAt(ord & 63)
        ];
      return chars.join('');
    };
    var btoa = global.btoa ? function (b) {
      return global.btoa(b);
    } : function (b) {
      return b.replace(/[\s\S]{1,3}/g, cb_encode);
    };
    var _encode = buffer ?
      buffer.from && Uint8Array && buffer.from !== Uint8Array.from
        ? function (u) {
          return (u.constructor === buffer.constructor ? u : buffer.from(u))
            .toString('base64')
        }
        : function (u) {
          return (u.constructor === buffer.constructor ? u : new buffer(u))
            .toString('base64')
        }
      : function (u) { return btoa(utob(u)) }
      ;
    var encode = function (u, urisafe) {
      return !urisafe
        ? _encode(String(u))
        : _encode(String(u)).replace(/[+\/]/g, function (m0) {
          return m0 == '+' ? '-' : '_';
        }).replace(/=/g, '');
    };
    var encodeURI = function (u) { return encode(u, true) };
    // decoder stuff
    var re_btou = new RegExp([
      '[\xC0-\xDF][\x80-\xBF]',
      '[\xE0-\xEF][\x80-\xBF]{2}',
      '[\xF0-\xF7][\x80-\xBF]{3}'
    ].join('|'), 'g');
    var cb_btou = function (cccc) {
      switch (cccc.length) {
        case 4:
          var cp = ((0x07 & cccc.charCodeAt(0)) << 18)
            | ((0x3f & cccc.charCodeAt(1)) << 12)
            | ((0x3f & cccc.charCodeAt(2)) << 6)
            | (0x3f & cccc.charCodeAt(3)),
            offset = cp - 0x10000;
          return (fromCharCode((offset >>> 10) + 0xD800)
            + fromCharCode((offset & 0x3FF) + 0xDC00));
        case 3:
          return fromCharCode(
            ((0x0f & cccc.charCodeAt(0)) << 12)
            | ((0x3f & cccc.charCodeAt(1)) << 6)
            | (0x3f & cccc.charCodeAt(2))
          );
        default:
          return fromCharCode(
            ((0x1f & cccc.charCodeAt(0)) << 6)
            | (0x3f & cccc.charCodeAt(1))
          );
      }
    };
    var btou = function (b) {
      return b.replace(re_btou, cb_btou);
    };
    var cb_decode = function (cccc) {
      var len = cccc.length,
        padlen = len % 4,
        n = (len > 0 ? b64tab[cccc.charAt(0)] << 18 : 0)
          | (len > 1 ? b64tab[cccc.charAt(1)] << 12 : 0)
          | (len > 2 ? b64tab[cccc.charAt(2)] << 6 : 0)
          | (len > 3 ? b64tab[cccc.charAt(3)] : 0),
        chars = [
          fromCharCode(n >>> 16),
          fromCharCode((n >>> 8) & 0xff),
          fromCharCode(n & 0xff)
        ];
      chars.length -= [0, 0, 2, 1][padlen];
      return chars.join('');
    };
    var atob = global.atob ? function (a) {
      return global.atob(a);
    } : function (a) {
      return a.replace(/[\s\S]{1,4}/g, cb_decode);
    };
    var _decode = buffer ?
      buffer.from && Uint8Array && buffer.from !== Uint8Array.from
        ? function (a) {
          return (a.constructor === buffer.constructor
            ? a : buffer.from(a, 'base64')).toString();
        }
        : function (a) {
          return (a.constructor === buffer.constructor
            ? a : new buffer(a, 'base64')).toString();
        }
      : function (a) { return btou(atob(a)) };
    var decode = function (a) {
      return _decode(
        String(a).replace(/[-_]/g, function (m0) { return m0 == '-' ? '+' : '/' })
          .replace(/[^A-Za-z0-9\+\/]/g, '')
      );
    };
    var noConflict = function () {
      var Base64 = global.Base64;
      global.Base64 = _Base64;
      return Base64;
    };
    // export Base64
    global.Base64 = {
      VERSION: version,
      atob: atob,
      btoa: btoa,
      fromBase64: decode,
      toBase64: encode,
      utob: utob,
      encode: encode,
      encodeURI: encodeURI,
      btou: btou,
      decode: decode,
      noConflict: noConflict
    };
    // if ES5 is available, make Base64.extendString() available
    if (typeof Object.defineProperty === 'function') {
      var noEnum = function (v) {
        return { value: v, enumerable: false, writable: true, configurable: true };
      };
      global.Base64.extendString = function () {
        Object.defineProperty(
          String.prototype, 'fromBase64', noEnum(function () {
            return decode(this)
          }));
        Object.defineProperty(
          String.prototype, 'toBase64', noEnum(function (urisafe) {
            return encode(this, urisafe)
          }));
        Object.defineProperty(
          String.prototype, 'toBase64URI', noEnum(function () {
            return encode(this, true)
          }));
      };
    }
    //
    // export Base64 to the namespace
    //
    if (global['Meteor']) { // Meteor.js
      Base64 = global.Base64;
    }
    // module.exports and AMD are mutually exclusive.
    // module.exports has precedence.
    if (typeof module !== 'undefined' && module.exports) {
      module.exports.Base64 = global.Base64;
    }
    else if (typeof define === 'function' && define.amd) {
      // AMD. Register as an anonymous module.
      define([], function () { return global.Base64 });
    }
    // that's it!
    return { Base64: global.Base64 }
  }));
  